Wiring the home limit switch input, Figure 4 wiring the ok contacts, Figure 5 – Rockwell Automation 1756-HYD02 ControlLogix Hydraulic Servo Module User Manual
Page 11
ControlLogix™ Hydraulic Servo Module 11
Publication
1756-IN580A-EN-P - March 2003
Wiring the Home Limit Switch Input
The home limit switch inputs to the servo module are designed for
24V dc nominal operation. These inputs should be wired for current
sourcing operation.
Figure 4
Wiring the OK Contacts
A set of isolated solid- state OK relay contacts is provided for optional
interface to an E- stop string, which controls power to the associated
pumps. The OK contacts are rated to drive an external 24V dc pilot
relay (for example, Allen-Bradley 700- HA32Z24) whose contacts can
be incorporated into the E- Stop string as in Figure 5.
Figure 5
From
1756-HYD02
HOME
IN_COM
24 V dc
Power
Supply
+
–
43396
General cable
C0720
From
1756-HYD02
+OK
-OK
24 V dc
Power
Supply
+
–
43397
OK Pilot
Relay
43398
OK Pilot
Relay
Contacts
Start
Stop
CR1
CR1
CR1
M1
24V ac/dc or
120V ac
typical
General cable
C0720